In situ measurements of oxygen isotopic composition in deep-sea coral, Lophelia pertusa: Re-examination of the current geochemical models of biomineralization

Rollion‐Bard, Claire; Blamart, Dominique; Cuif, Jean‐Pierre; Dauphin, Yannicke

doi:10.1016/j.gca.2009.11.011

Cited by 62 publications

(62 citation statements)

References 72 publications

(101 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Moreover, the extent of disequilibrium (the so-called "vital effect") displays strong spatial coherence with structural growth characteristics of the coral, for example, (i) the granular crystals of the COC are more depleted in both 13 C and 18 O compared with the surrounding aragonite fibres (Rollion-Bard et al, 2003a, 2003bMeibom et al, 2006), (ii) structural dissepiments are associated with CaCO 3 that is more strongly depleted in 18 O (RollionBard et al, 2003a), and (iii) rapidly extending areas within a colony are depleted in both 13 C and 18 O compared with slower extending areas (Land et al, 1975;McConnaughey, 1989;Suzuki et al, 2005). In a variety of different ways, these structural relations challenge the robustness of the current geochemical explanation(s) of vital effects in corals (reviewed by Rollion-Bard et al, 2010), especially given new evidence from boron isotope data showing that the carbonate within the COC is deposited at lower pH compared with the surrounding fibres (Rollion-Bard et al, 2003a). These inconsistencies caused Rollion-Bard et al (2010) to question the existence of a continuous (common) fluid layer domain for cystralization of COCs and fibres.…”

Section: S Wooldridge: a New Conceptual Model Of Coral Biomineralisamentioning

confidence: 99%

“…In a variety of different ways, these structural relations challenge the robustness of the current geochemical explanation(s) of vital effects in corals (reviewed by Rollion-Bard et al, 2010), especially given new evidence from boron isotope data showing that the carbonate within the COC is deposited at lower pH compared with the surrounding fibres (Rollion-Bard et al, 2003a). These inconsistencies caused Rollion-Bard et al (2010) to question the existence of a continuous (common) fluid layer domain for cystralization of COCs and fibres. However, the geochemical consequences of the new coral biomineralisation model can reconcile carbon and oxygen isotope vital effects whilst maintaining the common fluid layer concept.…”

Section: S Wooldridge: a New Conceptual Model Of Coral Biomineralisamentioning

confidence: 99%

See 1 more Smart Citation

A new conceptual model of coral biomineralisation: hypoxia as the physiological driver of skeletal extension

Wooldridge

2013

Biogeosciences

View full text Add to dashboard Cite

That corals skeletons are built of aragonite crystals with taxonomy-linked ultrastructure has been well understood since the 19th century. Yet, the way by which corals control this crystallization process remains an unsolved question. Here, I outline a new conceptual model of coral biomineralisation that endeavours to relate known skeletal features with homeostatic functions beyond traditional growth (structural) determinants. In particular, I propose that the dominant physiological driver of skeletal extension is night-time hypoxia, which is exacerbated by the respiratory oxygen demands of the coral's algal symbionts (= zooxanthellae). The model thus provides a new narrative to explain the high growth rate of symbiotic corals, by equating skeletal deposition with the "work-rate" of the coral host needed to maintain a stable and beneficial symbiosis. In this way, coral skeletons are interpreted as a continuous (long-run) recording unit of the stability and functioning of the coral–algae endosymbiosis. After providing supportive evidence for the model across multiple scales of observation, I use coral core data from the Great Barrier Reef (Australia) to highlight the disturbed nature of the symbiosis in recent decades, but suggest that its onset is consistent with a trajectory that has been followed since at least the start of the 1900s. In concluding, I outline how the proposed capacity of cnidarians (which includes modern reef corals) to overcome the metabolic limitation of hypoxia via skeletogenesis also provides a new hypothesis to explain the sudden appearance in the fossil record of calcified skeletons at the Precambrian–Cambrian transition – and the ensuing rapid appearance of most major animal phyla

show abstract

Section: S Wooldridge: a New Conceptual Model Of Coral Biomineralisamentioning

confidence: 99%

Section: S Wooldridge: a New Conceptual Model Of Coral Biomineralisamentioning

confidence: 99%

A new conceptual model of coral biomineralisation: hypoxia as the physiological driver of skeletal extension

Wooldridge

2013

Biogeosciences

View full text Add to dashboard Cite

show abstract

“…Meibom et al, 2007). High-resolution proxy studies detected a cyclicity of measured proxy values in the range of weekly to monthly periods (Meibom et al, 2003;Rollion-Bard et al, 2003;Cohen and Sohn, 2004;Allison et al, 2010Allison et al, , 2011. In these studies the proxy relation (e.g.…”

Section: Growth Patterns and Cyclicitymentioning

confidence: 99%

“…Corals are well known for recording environmental parameters, but high-resolution analysis revealed some constraints associated with the skeletal structural complexity (e.g. Meibom et al, 2004;Cuif and Dauphin, 2005b;Juillet-Leclerc et al, 2009;Rollion-Bard et al, 2010). The wealth of chemical information obtained by CRM can potentially be applied to acquire environmental information and complement proxy studies.…”

Section: Chemical Characterization Of Organic Compoundsmentioning

confidence: 99%

Reconstructing skeletal fiber arrangement and growth mode in the coral <i>Porites lutea</i> (Cnidaria, Scleractinia): a confocal Raman microscopy study

Wall

Nehrke

2012

Biogeosciences

View full text Add to dashboard Cite

Abstract. Confocal Raman microscopy (CRM) mapping was used to investigate the microstructural arrangement and organic matrix distribution within the skeleton of the coral Porites lutea. Relative changes in the crystallographic orientation of crystals within the fibrous fan-system could be mapped, without the need to prepare thin sections, as required if this information is obtained by polarized light microscopy. Simultaneously, incremental growth lines can be visualized without the necessity of etching and hence alteration of sample surface. Using these methods two types of growth lines could be identified: one corresponds to the well-known incremental growth layers, whereas the second type of growth lines resemble denticle finger-like structures (most likely traces of former spines or skeletal surfaces). We hypothesize that these lines represent the outer skeletal surface before another growth cycle of elongation, infilling and thickening of skeletal areas continues. We show that CRM mapping with high spatial resolution can significantly improve our understanding of the micro-structural arrangement and growth patterns in coral skeletons.

show abstract

“…Ion probe oxygen isotope analyses of the aragonite part of the shell were performed at CRPG-CNRS (Nancy) using a Caméca ims 1270. The analytical settings were the same as those described in Rollion-Bard et al [17]. Briefly, a primary beam of Cs + ions with an intensity of about 8 nA was focused on a spot approximately 20 µm in diameter.…”

Section: Oxygen Isotope Measurementsmentioning

confidence: 99%

Influence of the Depth on the Shape and Thickness of Nacre Tablets of Pinctada margaritifera Pearl Oyster, and on Oxygen Isotopic Composition

Rousseau

Rollion‐Bard

2012

Minerals

Self Cite

View full text Add to dashboard Cite

Nacre, or mother of pearl, is composed of aragonite tablets and is produced by some mollusks. Because of the highly organized internal structure, chemical complexity, mechanical properties and optical effects of nacre, its formation is among the best-studied examples of calcium carbonate biomineralization. The pearl oyster Pinctada margaritifera is harvested in French Polynesia for pearl farming. The quality of the pearl depends on the quality of the nacre on its surface and its iridescent colors are affected by the thickness of the layers. Here we report on an experimental study conducted to influence the shape and the thickness of nacre tablets by keeping pearl oysters at four different depths (7, 20, 30 and 39 m) for one week. Scanning electron microscopy was used to measure the thickness of the nacre tablets and to analyze their final shape. The shape of the tablets changed from hexagonal to rhomboid at a depth of 39 m. The change in shape led to a change in size. The thickness of the tablets was reduced by between 16 and 30% on average. We also measured the oxygen isotopic composition using Secondary Ion Mass Spectrometry. In this study, we demonstrated that depth can modify the size, shape and thickness of nacre tablets, but not the δ 18O. This environmental modification is important for the biomineralization of the shell of the pearl oyster Pinctada margaritifera.

show abstract

In situ measurements of oxygen isotopic composition in deep-sea coral, Lophelia pertusa: Re-examination of the current geochemical models of biomineralization

Cited by 62 publications

References 72 publications

A new conceptual model of coral biomineralisation: hypoxia as the physiological driver of skeletal extension

A new conceptual model of coral biomineralisation: hypoxia as the physiological driver of skeletal extension

Reconstructing skeletal fiber arrangement and growth mode in the coral <i>Porites lutea</i> (Cnidaria, Scleractinia): a confocal Raman microscopy study

Influence of the Depth on the Shape and Thickness of Nacre Tablets of Pinctada margaritifera Pearl Oyster, and on Oxygen Isotopic Composition

Contact Info

Product

Resources

About

In situ measurements of oxygen isotopic composition in deep-sea coral, Lophelia pertusa: Re-examination of the current geochemical models of biomineralization

Cited by 62 publications

References 72 publications

A new conceptual model of coral biomineralisation: hypoxia as the physiological driver of skeletal extension

A new conceptual model of coral biomineralisation: hypoxia as the physiological driver of skeletal extension

Reconstructing skeletal fiber arrangement and growth mode in the coral &lt;i&gt;Porites lutea&lt;/i&gt; (Cnidaria, Scleractinia): a confocal Raman microscopy study

Influence of the Depth on the Shape and Thickness of Nacre Tablets of Pinctada margaritifera Pearl Oyster, and on Oxygen Isotopic Composition

Contact Info

Product

Resources

About

Reconstructing skeletal fiber arrangement and growth mode in the coral <i>Porites lutea</i> (Cnidaria, Scleractinia): a confocal Raman microscopy study